ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,462,662, issued on Nov. 4, was assigned to Zebra Technologies Corp. (Lincolnshire, Ill.).
"Radio frequency proximity detection devices" was invented by James J. O'Hagan (McHenry, Ill.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method includes: transmitting, by a first radio frequency transceiver of a first device, a first signal; receiving, by the first radio frequency transceiver of the first device, a second signal in response to the first signal; determining a time value associated with the receiving of the second signal; determining that at least one of the time value or a distance value determined using the time value is less than or equal to ...